Trenton, MO - 2026 Building Permit Guide

Permit Authority

Staff manage citywide building, demolition, rental, and zoning approvals. ?cite?turn22view0?

Department

City of Trenton Permits & Zoning (Codes & Zoning section manages building permits, rental oversight, and zoning reviews). ?cite?turn22view0?

Address

1100 Main Street, Trenton, MO 64683. ?cite?turn22view0?

Phone

(660) 359-2013 ext. 16. ?cite?turn22view0?

Email

codes@trentonmo.com. ?cite?turn22view0?

Website

https://trentonmo.com/government/departments/permits-zoning/. ?cite?turn22view0?

Online Permit Portal

Application Process

1. Download or request the building permit instructions, site plan checklist, contractor occupational license application, and other forms from Permits & Zoning. ?cite?turn27view0?
2. Submit a completed application through BS&A Online with three sets of construction documents (site plan, structural, mechanical, electrical, plumbing, and any required sealed drawings) plus a valuation estimate. ?cite?turn9view0?
3. The building official reviews the package, assesses fees, issues the certificate of compliance, and schedules inspections. ?cite?turn9view0?
4. Once all inspections pass, the city issues a certificate of occupancy; occupying a building before the certificate is issued is prohibited. ?cite?turn9view0?

Typical processing time: Not published on the city site; contact the codes office for current turnaround. ?cite?turn22view0?

Source: City of Trenton Permits & Zoning (Codes & Zoning section manages building permits, rental oversight, and zoning reviews). ?cite?turn22view0?

General Requirements

Construction, relocation, or structural alteration within city limits requires a permit except for interior maintenance that leaves exterior dimensions and occupancy unchanged. ?cite?turn9view0?

Required Documents

• When a permit is required: Construction, relocation, or structural alteration within city limits requires a permit except for interior maintenance that leaves exterior dimensions and occupancy unchanged. ?cite?turn9view0?
• Required documents: At least three sets of scaled drawings, including general construction, special inspections, structural, mechanical, electrical, and plumbing details, plus a site plan with property line dimensions. ?cite?turn9view0?
• Permit validity/expiration: Permits expire after 180 days unless the building official grants a written extension; expired permits require a new application and fees. ?cite?turn9view0?
• Owner-builder rules if available: No certificate is required for maintenance or remodeling that does not increase coverage or change occupancy. ?cite?turn9view0?
• Contractor license requirements: The city posts a Contractor Occupational License application, so trades must satisfy that requirement before pulling permits. ?cite?turn27view0?
• Building code adopted: The city adopts the 2015 International Building Code with local amendments. ?cite?turn15view0?

Permit validity

Permits expire after 180 days unless the building official grants a written extension; expired permits require a new application and fees. ?cite?turn9view0?

Building code

The city adopts the 2015 International Building Code with local amendments. ?cite?turn15view0?

Owner-builder

No certificate is required for maintenance or remodeling that does not increase coverage or change occupancy. ?cite?turn9view0?

Contractor requirements

The city posts a Contractor Occupational License application, so trades must satisfy that requirement before pulling permits. ?cite?turn27view0?

Fees

Minimum permit fee

for most residential remodeling; additional for each ,000 above ,000 for residential work, and plus per ,000 above ,000 for commercial. ?cite?turn9view0?

Plan check fee

Plan review fees equal 0.0010 times the estimated construction cost (0.0005 for life safety/sprinkler plan review) with a minimum; consultant costs are pass-throughs. ?cite?turn9view0?

Permit fee formula

New construction uses ICC Building Valuation Data with a regional multiplier of 0.080 and fee multipliers that vary by occupancy group. ?cite?turn9view0?

Reinspection fee

Reinspections cost per hour (minimum half hour); investigation fees equal the permit fee if work starts before a permit is issued. ?cite?turn9view0?

Payment note

All fees must be paid before the permit is issued; refunds are limited to 80% of the permit fee when no work has been done. ?cite?turn9view0?

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

Contact the City of Trenton Permits & Zoning (Codes & Zoning section manages building permits, rental oversight, and zoning reviews). ?cite?turn22view0? to confirm whether your project requires a permit before starting work.

Inspections

How to Schedule

• Inspections are scheduled through BS&A Online once the permit is issued. ?cite?turn10search1? ()

Inspection hours

Not listed online; coordinate with the codes office for inspector availability. ?cite?turn22view0?

Typical inspection sequence: Inspections follow the work progression at the discretion of the building official, including any special inspections. ?cite?turn9view0?

Additional Resources

• Building code: The city adopts the 2015 International Building Code with local amendments. ?cite?turn15view0?
• Zoning information: View zoning info
• ?cite?turn22view0?
• License lookup guide: Missouri Contractor License Requirements
• Contract template: Missouri Homeowner-Contractor Agreement
• Missouri hub: Missouri Contractor License & Permit Hub

Frequently Asked Questions

Trenton Building Permit FAQ

Do I need a building permit in Trenton, MO?

Construction, relocation, or structural alteration within city limits requires a permit except for interior maintenance that leaves exterior dimensions and occupancy unchanged. ?cite?turn9view0?

How much does a building permit cost in Trenton, MO?

The minimum permit fee is for most residential remodeling; additional for each ,000 above ,000 for residential work, and plus per ,000 above ,000 for commercial. ?cite?turn9view0?. Fees are calculated as: New construction uses ICC Building Valuation Data with a regional multiplier of 0.080 and fee multipliers that vary by occupancy group. ?cite?turn9view0?. Plan check fee: Plan review fees equal 0.0010 times the estimated construction cost (0.0005 for life safety/sprinkler plan review) with a minimum; consultant costs are pass-throughs. ?cite?turn9view0?.

How do I apply for a building permit in Trenton, MO?

1. Download or request the building permit instructions, site plan checklist, contractor occupational license application, and other forms from Permits & Zoning. ?cite?turn27view0? 2. Submit a completed application through BS&A Online with three sets of construction documents (site plan, structural, mechanical, electrical, plumbing, and any required sealed drawings) plus a valuation estimate. ?cite?turn9view0? 3. The building official reviews the package, assesses fees, issues the certificate of compliance, and schedules inspections. ?cite?turn9view0? 4. Once all inspections pass, the city issues a certificate of occupancy; occupying a building before the certificate is issued is prohibited. ?cite?turn9view0?

How long does it take to get a building permit in Trenton, MO?

Typical processing time is Not published on the city site; contact the codes office for current turnaround. ?cite?turn22view0?.

What work is exempt from building permits in Trenton, MO?

The following work is generally exempt: Interior maintenance that leaves exterior dimensions and occupancy unchanged is exempt; all other projects follow the standard permit process. ?cite?turn9view0?.

How do I schedule a building inspection in Trenton, MO?

Inspections can be scheduled via: Inspections are scheduled through BS&A Online once the permit is issued. ?cite?turn10search1?.